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Changes in metabolic hormones and eating behaviors before and after weight loss surgery

The NC Bariatric Project is a UNC study to learn about changes in hormones that affect weight, eating behaviors, stress, and weight loss outcomes before and after your weight loss surgery.

Age & Gender

  • 18 years ~ 99 years
  • Male, Female, Gender Inclusive

Visit Availability

  • Standard business hours (M-F, 8-5)
  • Extended hours (M-F, early morning or evening)
  • Weekend hours, if needed
  • In-home visits available


North Carolina (Statewide)

What will be asked of you

Participants will complete an anonymous online survey (about 1 to 1.5 hours time) before and after the weight loss surgery. Participation also involves a 30-minute in-person health assessment at the UNC Biobehavioral Laboratory or the participants' homes. The assessment includes measuring your height, weight, waist and hip circumferences, and blood pressure. We will also collect a blood sample to test your metabolic hormone and lipid levels.


Up to $200 Amazon gift cards ($100 at each time after the in-person assessment), Results of your height, weight, waist/hip circumferences, blood pressure, fasting metabolic and lipid hormones levels.

In-person visits:
Phone or online visits:
Total length of participation:
Before and 3 months after weight loss surgery.

Looking for Specific Volunteers

Able to participate:

  • You are a weight loss surgery candidate.
  • You are at least 18 years old.
  • You currently live in North Carolina.

Not eligible if:

  • You have a history of coagulation disorders (not including using blood thinners medicines such as aspirin).

Contact the Team

Visit Location

Contact & Visit Location

Primary Contact

Primary Visit Location

Biobehavioral Lab (BBL)
Carrington Hall (UNC-Chapel Hill, School of Nursing)
120 Medical Dr, Chapel Hill, NC 27514, USA

Secondary Visit Location

Your Home

Additional Study Information

Principal Investigator

Grace Wu
School of Nursing

Study Type

Behavioral or Social

Study Topics

Healthy Volunteer or General Population
Mental and Emotional Health
Wellness and Lifestyle
UNC or UNC Health employees

IRB Number


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